/*
 * Copyright 2022 The Open Islands Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openislands.oi.master.scheduler;

import com.fasterxml.jackson.core.JsonProcessingException;
import org.openislands.oi.scheduling.DAG;
import org.openislands.oi.scheduling.DAGException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;


public class DAGParser {
    private static Logger logger = LoggerFactory.getLogger(DAGParser.class);
    private DAG dag;

    public DAGParser(String config) throws IOException, DAGException {
        // 读取配置文件
        Yaml yaml = new Yaml(new Constructor(DAG.class));
        InputStream inputs = new FileInputStream(new File(config));
        dag = yaml.load(inputs);
    }

    public DAG getDag() {
        return this.dag;
    }

    // 解析json字符串表示的配置
    public void fromJson(String json) throws JsonProcessingException {
        dag = DAG.fromJson(json);
        return;
    }

    public String toJson() throws JsonProcessingException {
        return dag.toJson();
    }
}

